Samsung MZ-QL215T0 15.36 TB PM9A3 PCIe 4.0 x4, NVMe 1.4 U.2 (2.5 inch 7mm) Enterprise/Read-Intensive Solid State Drive

General

Brand	Samsung
Model	PM9A3
Capacity	15.36 TB
Usage Class	Enterprise/Read-Intensive

Interface

Host Interface	PCIe 4.0 x4, NVMe 1.4
Total Interface Bandwidth	64 Gb/s

Physical Dimension

Form Factor	U.2 (2.5 inch 7mm)

Flash & Endurance

NAND Flash	Samsung V6 (128L) TLC
Drive Writes Per Day	1
Total Bytes Written	28032 TBW

Performance

Sequential Read	6800 MB/s
Sequential Write	4000 MB/s
Random Read IOPS	1000000
Random Write IOPS	180000
Average Latency	80 μs

Reliability

Mean Time Between Failures	2 Million Hours
Uncorrectable Bit Error Rate	1.0×10⁻¹⁷
Power Loss Protection	Yes

Part Number

MPN	MZ-QLBW15T3-00007

Engineer's Note

Compared with MZ-QLBW15T3-00007, the PM9A3 MZ-QL215T0 moves to PCIe 4.0 x4/NVMe 1.4 and delivers 6,800/4,000 MB/s sequential throughput with up to 1,000,000/180,000 random IOPS, providing a clear generational uplift in bandwidth and mixed-workload responsiveness at the same 15.36 TB, 1 DWPD endurance class. It is an excellent choice for read-heavy databases, virtualization clusters, and dense enterprise storage tiers that need maximum capacity density and faster rebuild/cache performance without stepping up to higher-endurance media.

Endurance & Reliability

With an endurance rating of 28,032 TBW and 1 DWPD, the MZ-QL215T0 is built to sustain heavy daily write activity across its service life, making it well suited for enterprise system, cache, and mixed-workload deployments. In typical real-world use, this level of endurance means procurement teams can expect long-term, worry-free operation under normal server workloads, rather than the drive wearing out prematurely. For enterprise reliability, the drive includes Power Loss Protection (PLP), which helps preserve in-flight data and protect metadata integrity if power is unexpectedly interrupted. Its UBER of 1.0E-17 indicates an extremely low uncorrectable bit error rate, supporting high data integrity and dependable operation in business-critical environments.

Technical Specs & Insights

1. The PCIe 4.0 x4 NVMe 1.4 architecture gives this drive the host-side bandwidth and command efficiency needed to keep modern virtualization, analytics, and GPU servers fed without becoming a storage bottleneck.
2. Its high sequential read capability accelerates large block transfers, making it especially effective for faster database warm-up, backup restores, media streaming, and AI dataset loading.
3. Strong random read performance translates into snappier response under highly concurrent small-block workloads such as OLTP databases, metadata services, and dense virtual desktop environments.
4. The enterprise endurance profile, paired with Samsung’s 128-layer TLC NAND, provides a balanced mix of write life, flash density, and cost efficiency for read-centric data center deployments that still require dependable long-term operation.
5. Very low typical latency helps reduce tail-response delays, which is critical for customer-facing applications, real-time analytics, and scale-out platforms where consistent I/O timing matters as much as raw throughput.

Capacity Sweet

Lower capacity reference: 7.68 TB Higher capacity reference: 30.72 TB In this series, 15.36 TB is the sweet-spot capacity. Compared with 7.68 TB, it provides much better headroom for VM growth, database expansion, and longer refresh cycles without increasing drive count too quickly. Compared with 30.72 TB, it usually delivers the best balance of acquisition cost, usable density, and predictable enterprise performance, while keeping rebuild domains and per-drive risk at a comfortable level. It is especially well suited for mid-scale deployments, such as a 6 to 10 host virtualization cluster or a compact all-flash analytics tier.

FAQ